I discovered this company at GameCon: Memphis.
They sell terrain from many genres/years/scales and have excellent 15mm, WWII terrain. This is the best choice for Flames of War.
The quality is fantastic and the buildings "broke apart" to be damaged, with detailed interiors.
All pre-painted. They are a bit pricey, but worth it.
They are available at discount from Noble Night Games. I got my Heavy Gear from them. They are also availble from thewarstore.